salmon



4 Sheets-Sheet 1.

Patented 001;. 4, 1892.

(No Model.)

B. B. COXE & S."SALMON.

MECHANISM FOR DRILLING.

'(No Model.) 4 Sheets-Sheet 2.

E. B. GOXB & S. SALMON.

MECHANISM FOR DRILLING.

No. 4835903. Patented'Oct. 4, 1892 c c c.

57? 5 E i AZ Al fl l X z s l I c C c i C d d i d C c L l 1 a 1 f X 1 i (No Model.)

4 Sheets-Sheet 3.

E. B. COKE & s; SALMON. MECHANISM FOR DRILLING.

Patented Oct. 4, 1892.

4Sheets- Sheet 4.

(No Model.)

E. B. OOXE 8v S. SALMON.

- MECHANISM FOR DRILLING.

' Patented Oct. 4, 1892.

UNITED EN -T"' QFEI,C.E.-'

EOKLEY B. COXE AND SAMUEL sALMoN, oF DRYIYFTON, PENNSYLVANIA;

' SAID SALMON ASSIGNORTO sAn) OOXE.

MECHANISM FOR DR-ILL'IING'.

SPECIFICATION forming part of Letters P tent No. 4s3,9o3, dated. October 4, 1892. Application filed April 4., 1888. Renewed May 2,1889. Serial no. am. (No model.)

To aZZ whom it may concern:

Be it known that we,EOKLEY B. COXE and SAMUEL SALMON, of Drifton,in the county of Luzerne, and in the State of Pennsylvania, have invented certain new and uset'nl Improvements in Mechanism for Drilling; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which Figure 1 is a perspective view of one form of our mechanism from the upper orcrank side. the lower or drillside. Fig. 3 is a plan view of said mechanism from the crank side. Fig. 4 is a side elevation of the same, the full lines showing one position of the oscillating plate and the dotted lines the opposite position of the same. Fig. 5 is a vertical section of said mechanism, with its supporting frame, when in operation. Fig. 6 is a side elevation of a form of mechanism in which the work is placed above the drills and moved downward into engagement with the same. Fig. 7 is a like view of said mechanism when arranged for operation upon a vertical face. Fig. 8 is an enlarged perspective view of one of the crank-drills separated from the oscillating and guide plates. Fig. 9 is a like View of a guide-sleeve for use with a drill. Fig. 10 is an enlarged central longitudinal section of said drill and sleeve as combined and in position for use. Fig. 11 is a perspective view of a drill and crank made separate from each other, and Fig. 12 is a like view of the same combined for use.

Letters of like name and kind refer to like parts in each of the figures.

Our invention is designed to facilitate the simultaneous drilling of a number of holes within plates or other partsof I mechanisms which require to be duplicated; and to such end ourinvention consists principally in the means'employed for simultaneously rotating a number of drills, which are arranged with their axes in parallel lines, substantially as and for the purpose hereinafter specified.

It consists, further, in the means employed for journaling a number of drills having par- Fig. 2 is a like view of the same from pared for use Qinfconnection with a boilerplate which has a row of holes along each edge to adapt it to be riveted to or upon the edge of a connecting-plate. Within each of the holes I) and b is placed a twist-drill O, that loosely fills the same, and upon its upper end is provided with an ecc entrically-located journal c, which has substantially the same diameter as and is arrangedwith its axis parallel with the axis of said drill, the relative arrangement of said parts constituting as a whole a crank. Thejournals o and c of the crank-drills O and O are now given thesame relative positions, and over themis placed the plate A, each of the holes a and a being caused to engage with and contain one of said journals, and the weight of said plate being supported upon the enlargement c, which forms the connection between said journals and the drills. It, now, said plate A is moved horizontally in the direction necessary to rotate one of the cranks, each of the drills will be simultaneously rotated in the same direction and with preciselyfthe same velocity.

In practice the plate B, which operates as a templet, is placed upon and secured to the part to be drilled, shown in the drawings as a number of boiler plates D and- D, the drills O and O and plate 'A placedin position, and the whole then moved beneath a frame E, within which is journaled a vertical shaft F, that upon its lower end is provided with a crank f, which is adapted to engage with said plate A. Said crank f has precisely the same throw as have the drill-cranks, so that when said shaft is set in motion said plate A will be caused to oscillate in a horizontal plane and said drills O and Cto be rotated. As the drills are rotated their lower operative ends will be caused to cut into the plates D and D in the usual manner, the weight of the plate A being usually sufficient to give the required downward pressure. Should, however, greater pressure be necessary, it may be supplied by placing weights upon said plate A or by any of the means commonly employed for such purposes in connection wit-h drill-presses.

The crank f has such length as to enable it to keep in engagement with the plate A during the downward movement of the latter as the drilling progresses.

In Fig. 6 is shown an arrangement of parts in which the Work is placed above the drills and is moved down upon the same. In such construction the plate A is supported upon four double-cone rollers G and G,which rollers are placed between the upper side of the bedplate H and the lower side of said plate A and furnish rolling bearings for the latter. Said rollers have such proportions as to permit said plate A to have a circular horizontal motion which exactly corresponds to the throw of the drillcranks. A vertically-journaled shaft F, having upon its upper end a crank f, operates to oscillate said plate A, as in the arrangement before described. The plates to be drilled are placed upon the templet B and by gravity move downward as the drills cut away the metal. Where the weights of said plates and templet are in excess of the requirements for feeding the Work downward, any desired portion of such weight may be neutralized by means of two or more counter-weights I and I, as shown.

In Fig. 7 is shown a construction of mechanism by which the drills may be caused to operate upon a vertical face. In such construction the operative plate A is counterbalanced and arranged to move within guides that permit of free motion in the plane of its oscillation, while operating to prevent said plate from leaving such plane. The templet 13, together with the plates to be drilled, is

' placed vertically upon a truck or slide K and the whole then moved toward or from the operative plate A, as required. Motion is given to the latter by means of a shaft F,that is provided with a crank f, as in the construction before described. As the body of each drill O is cylindrical and of uniform diameter and the clearance-grooves c and c lessen but little its bearing-surface, said drill will run in such size as to adapt it to receive a drill and to permit the same to move easily therein, and within it's axial opening Z is provided with a stud Z, that projects radially inward and engages with one of the clearance-grooves c, and thereby locks said bushing and drill together circumferentially, so as to compel the former to rotate with the latter, while permitting of the free longitudinal movement of said drill through said bushing. If de sired, the bushing may have a plain round interior, so as to permit the drill to rotate independently within the same. As thus arranged the entire wear caused by the rotation of a drill is between the periphery of the bushing and the sides of the opening in the templet in which it is journaled, so that by hardening such surfaces perfect accuracy and great durablility can be secured.

It is intended that the drills and their cranks shall be integral, as shown, but, if desired, each drill may be separate and provided at its upper end with a tapering shank, and the lower portion of each crank, like the socket end of an ordinary drill-spindle, may be adapted to receive and contain such shank, as shown in Figs. 11 and 12.

We are aware that heretofore drills have been journaled with parallel axes within two supporting-plates and sim ultaneously rotated by means of crank-disks, which wereengaged by pins upon a third oscillating plate, and do not claim such mechanism.

Having thus described our invention, what we claim is- 1. As an improvement in drilling mechanism, in combination, a series of vertically journaled and vertically-movable cranked drills, a crank-plate engaging the drill-cranks and adapted to move downward of its gravity and carry with it said drills and so feed the same to their work, and suitable means for oscillating said plate, substantially as and for the purpose set forth.

2. As an improvement in drilling mechan-.

templet which is provided with a drill-open-v ing, a bushing or thimble that is journaled within such opening and is adapted to receive such drill and permit it to pass longitudinally through the same, substantially as and for the purpose shown. v

4. As an improvement in drilling mechan- IIO isms, in combination with a drill and with a v templet which is provided with a dri1l-openwe have hereunto set our hands this 31st day ing, a bushing or thimble that is journaled of March, A. D. 1888.

within such drill-opening and is adapted to .EOKLEY B. OOXE.

receive such drill and permit it to pass through SAMUEL SALMON. 5 the same in the line of the clearance-grooves, Witnesses:

substantially as and for the purpose set forth. HARRY J. DAVIS,

In testimony that we claim the foregoing ELLIOTT A. OBERRENDER. 

